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Release History

Version Date Description
2.4 2015-09-20 GA Release 2.4
2.3 2015-05-09 GA Release 2.3
2.2 2015-02-22 GA Release 2.2
2.1 2014-10-19 GA Release 2.1
2.0.2 2014-08-16 Bug fixes and enhancements
2.0.1 2014-07-29 Bug fixes
2.0 2014-07-12 GA Release
2.0-rc2 2014-06-21 Bug fixes and enhancements
2.0-rc1 2014-02-16 Bug fixes and enhancements
2.0-beta9 2013-09-14 Bug fixes and enhancements
2.0-beta8 2013-07-10 Bug fixes and enhancements
2.0-beta7 2013-06-01 Bug fixes and enhancements
2.0-beta6 2013-05-05 Bug fixes and enhancements
2.0-beta5 2013-04-20 Bug fixes and enhancements
2.0-beta4 2013-01-28 Bug fixes and enhancements
2.0-beta3 2012-11-11 Bug fixes and enhancements
2.0-beta2 2012-10-07 Bug fixes and enhancements
2.0-beta1 2012-09-18 Bug fixes and enhancements
2.0-alpha2 2012-08-24 Bug fixes and minor enhancements
2.0-alpha1 2012-07-29 Rewrite of Log4j

Release 2.4 – 2015-09-20

Type Changes By
Add Add support for configuration via Properties. Fixes LOG4J2-635. rgoers
Add Add ConfigurationBuilder. Fixes LOG4J2-952. rgoers
Update Update Java platform from Java 6 to 7. From this version onwards, log4j 2 requires Java 7. Fixes LOG4J2-1017. ggregory
Add Added support for Java 8 lambda expressions to lazily construct a log message only if the requested log level is enabled. Fixes LOG4J2-599. rpopma
Add Updated Logger wrapper generator tool to add Java 8 lambda support for custom log levels. Fixes LOG4J2-1118. rpopma
Add New Appender for Apache Kafka. Fixes LOG4J2-1107. Thanks to Mikael Ståldal. ggregory
Add New publisher Appender for ZeroMQ (using JeroMQ). Fixes LOG4J2-1113. Thanks to Gary Gregory. ggregory
Add Add Comma Separated Value (CSV) layouts for parameter and event logging. Fixes LOG4J2-1088. Thanks to Gary Gregory. ggregory
Update PatternLayout timestamp formatting performance improvement: replaced synchronized SimpleDateFormat with Apache Commons FastDateFormat. This and better caching resulted in a ~3-30X faster timestamp formatting. Fixes LOG4J2-812. rgoers
Update PatternLayout timestamp formatting performance improvement: predefined date formats (and variants using a period '.' millisecond separator instead of ',') are now formatted ~2-10X faster than other date formats. Fixes LOG4J2-1097. rpopma
Update Improved performance of ParameterizedMessage::getFormattedMessage by ~2X. Fixes LOG4J2-1096. rpopma
Update LoggerConfig performance improvements: avoid unnecessary lock acquisition, use more efficient data structure. Fixes LOG4J2-1120. rpopma
Update PatternLayout performance improvement by caching and reusing a ThreadLocal StringBuilder. Fixes LOG4J2-1125. rpopma
Fix Fixed potential race condition on reconfiguration. Introduced ReliabilityStrategy to facilitate switching between different mechanisms for preventing log events from being dropped on reconfiguration. Fixes LOG4J2-1121. rpopma
Update Add thread name to status logger layout. Fixes LOG4J2-1114. ggregory
Fix Core Configurator.initialize(String, ClassLoader, String) fails to work when config location is a file path. Fixes LOG4J2-1123. Thanks to Gary Gregory. ggregory
Fix OutputStreamManager in ConsoleAppender leaking managers. Fixes LOG4J2-1117. Thanks to Marcus Thiesen. ggregory
Fix Write pending events to Flume when the appender is stopped. Fixes LOG4J2-1044. rgoers
Fix NullPointerException when passing null to java.util.logging.Logger.setLevel(). Fixes LOG4J2-1108. Thanks to Mikael Ståldal. ggregory
Fix org.apache.logging.log4j.jul.CoreLogger.setLevel() checks for security permission too late. Fixes LOG4J2-1110. ggregory
Remove Removed experimental interface LevelLogger which got committed to master by mistake. rpopma
Update Pass log event when interpolating logger properties. Fixes LOG4J2-1010. rgoers
Add Add Core Configurator APIs to change a logger's level. Fixes LOG4J2-1090. ggregory
Add Add API org.apache.logging.log4j.Level.isInRange(Level, Level). Fixes LOG4J2-1105. Thanks to Gary Gregory. ggregory
Add Add a LevelRangeFilter class. Fixes LOG4J2-1106. Thanks to Gary Gregory. ggregory
Add Added support for system nanosecond time in pattern layout. Fixes LOG4J2-1076. rpopma
Add Added support for compressing to bzip2 format on file rollover. Fixes LOG4J2-1075. rpopma
Add Support additional Apache Commons Compress compression formats on rollover: Deflate, Pack200, XY. Fixes LOG4J2-1077. ggregory
Add New module for Liquibase integration. Fixes LOG4J2-767. Thanks to Mikael Ståldal. ggregory
Add New RewritePolicy for changing level of a log event. Fixes LOG4J2-1023. Thanks to Mikael Ståldal. ggregory
Add Add a way to route messages based on the %marker in Layout for RoutingAppender. Fixes LOG4J2-1015. Thanks to Daniel Marcotte. ggregory
Add Add a Log4jLookup class to help write log files relative to log4j2.xml. Fixes LOG4J2-1050. Thanks to Adam Retter. ggregory
Add Add API org.apache.logging.log4j.LogManager.getFormatterLogger(). Fixes LOG4J2-1057. ggregory
Add Expose Log4jContextFactory's ShutdownCallbackRegistry. Fixes LOG4J2-1066. Thanks to Charles Allen. ggregory
Fix Misleading StatusLogger WARN event in LogManager with java.util.Map. Fixes LOG4J2-1084. Thanks to Philipp Schneider. ggregory
Fix NoClassDefFoundError when starting app on Google App Engine. Fixes LOG4J2-1051. Thanks to Lukasz Lenart. ggregory
Fix ExtendedThrowablePatternConverter does not print suppressed exceptions. Fixes LOG4J2-684. Thanks to Joern Huxhorn, Mauro Molinari. ggregory
Fix Improper handling of JSON escape chars when deserializing JSON log events. Fixes LOG4J2-1069. Thanks to Sam Braam. ggregory
Fix Exceptions not logged when using TcpSocketServer + SerializedLayout. Fixes LOG4J2-1068. Thanks to Andy McMullan. ggregory
Fix ThrowableProxy getExtendedStackTraceAsString throws NPE on deserialized nested exceptions. Fixes LOG4J2-1067. Thanks to Sam Braam. ggregory
Fix AsyncAppender now resets the thread interrupted flag after catching InterruptedException. Fixes LOG4J2-1049. Thanks to Robert Schaft. rpopma
Fix FileConfigurationMonitor unnecessarily calls System.currentTimeMillis() causing high CPU usage. Fixes LOG4J2-1048. Thanks to Nikhil. rpopma
Fix Backward compatibility issue in log4j-1.2-api NDC pop() and peek(). Fixes LOG4J2-1037. Thanks to Marc Dergacz. ggregory
Fix Custom java.util.logging.Level gives null Log4j Level and causes NPE. Fixes LOG4J2-1025. Thanks to Mikael Ståldal. ggregory
Fix SimpleLogger creates unnecessary Map objects by calling ThreadContext.getContext() instead of getImmutableContext(). Fixes LOG4J2-1033. Thanks to Mikael Ståldal. ggregory
Fix HighlightConverter does not obey noConsoleNoAnsi. Fixes LOG4J2-1026. ggregory
Fix ZipCompressAction leaves files open until GC when an IO error takes place. Fixes LOG4J2-1019. ggregory
Fix GzCompressAction leaves files open until GC when an IO error takes place. Fixes LOG4J2-1020. ggregory
Fix Incorrect documentation for layout default charset. Fixes LOG4J2-1038. Thanks to Gili. ggregory
Fix Socket and Syslog appenders don't take timeout into account at startup. Fixes LOG4J2-1042. Thanks to Guillaume Turri. ggregory
Fix Circular suppressed Exception throws StackOverflowError. Fixes LOG4J2-934. Thanks to Kenneth Gendron. ggregory
Fix Circular Exception cause throws StackOverflowError. Fixes LOG4J2-1046. Thanks to Kenneth Gendron. ggregory
Fix Use System.nanoTime() to measure time intervals. Fixes LOG4J2-982. Thanks to Mikhail Mazurskiy. ggregory
Fix Externalize log4j2.xml via URL resource. Fixes LOG4J2-1045. Thanks to Günter Albrecht. ggregory
Fix Log4jMarker#contains(String) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1058. Thanks to Daniel Branzea. ggregory
Fix Log4jMarker#contains(Marker) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1060. ggregory
Fix Log4jMarker#remove(Marker) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1061. ggregory
Fix Log4jMarker#add(Marker) does not respect org.slf4j.Marker contract. Fixes LOG4J2-1062. ggregory
Fix org.apache.logging.slf4j.Log4jMarker does not implement org.slf4j.Marker.equals(Object) org.slf4j.Marker.hashCode(). Fixes LOG4J2-1064. ggregory
Fix Header in layout should not be written on application startup if appending to an existing file. Fixes LOG4J2-1030. Fixes LOG4J2-889. Thanks to Maciej Karaś, Kenneth Leider. rpopma
Fix Clarify documentation for combining async with sync loggers. Fixes LOG4J2-918. rpopma
Fix GelfLayout throws exception if some log event fields are null. Fixes LOG4J2-1078. Thanks to Mikael Ståldal. ggregory
Update Support batchSize in FlumeAvroManager. Fixes LOG4J2-1044. rgoers
Update Define org.apache.logging.log4j.Marker.equals(Object) and org.apache.logging.log4j.Marker.hashCode(). Fixes LOG4J2-1065. ggregory
Update Avoid creating temporary array object in org.apache.logging.slf4j.Log4jMarker.iterator(). Fixes LOG4J2-1063. ggregory
Update log4j-web-2.1 should workaround a bug in JBOSS EAP 6.2. Fixes LOG4J2-890. Thanks to Hassan Kalaldeh, Robert Andersson, Remko Popma. ggregory
Update MongoDB appender, username and password should be optional. Fixes LOG4J2-403. Thanks to Poorna Subhash P, Jeremy Lautman. ggregory
Update Log4j2 tries to SystemClassLoader when running on Google AppEngine. Fixes LOG4J2-1035. ggregory
Update Allow a list of keys to be specified in the MDC pattern converter. Fixes LOG4J2-1022. rgoers
Update Fix FindBugs DM_DEFAULT_ENCODING bug in SimpleLogger.logMessage() and simplify code. Fixes LOG4J2-959. ggregory
Update Update Apache Flume from 1.5.2 to 1.6.0. Fixes LOG4J2-1036. ggregory
Update Update MongoDB driver from 2.11.2 to 2.13.2. Fixes LOG4J2-1041. ggregory
Update Update database tests from H2 1.3.175 to 1.3.176. Fixes LOG4J2-1018. ggregory
Update Update Java Mail from 1.5.2 to 1.5.4. Fixes LOG4J2-1070. ggregory
Update Update Jackson from 2.5.3 to 2.5.4. Fixes LOG4J2-1079. ggregory
Update Update Jackson from 2.5.4 to 2.6.0. Fixes LOG4J2-1879. ggregory
Update Update Jackson from 2.6.0 to 2.6.1. Fixes LOG4J2-1092. ggregory
Update Update Apache Commons Compress from 1.9 to 1.10. Fixes LOG4J2-1104. ggregory

Release 2.3 – 2015-05-09

Type Changes By
Fix Incorrectly defined compressionType parameter to GelfLayout. Fixes LOG4J2-1009. Thanks to Mikael Ståldal. ggregory
Fix org.apache.logging.log4j.core.config.plugins.util.ResolverUtil.extractPath(URL) incorrectly converts '+' characters to spaces. Fixes LOG4J2-1008. Thanks to Ralph Goers, Gary Gregory. ggregory
Fix org.apache.logging.log4j.core.util#fileFromUri(URI uri) incorrectly converts '+' characters to spaces. Fixes LOG4J2-1007. Thanks to Ralph Goers, Gary Gregory. ggregory
Fix JUL Logger.throwing is mis-mapped to ERROR when it should be TRACE. Fixes LOG4J2-1003. Thanks to Dan Armbrust. ggregory
Fix System.out no longer works after the Console appender and JANSI are initialized. Fixes LOG4J2-965. Thanks to Khotyn Huang. ggregory
Update Make org.apache.logging.log4j.core.Logger#updateConfiguration protected. Fixes LOG4J2-998. Thanks to Mariano Gonzalez. ggregory
Update Move UTF-8 constant from Charsets to Constants class. Remove Charsets class. Fixes LOG4J2-995. rgoers
Fix Deadlock would occur if appender thread creates a new Logger during reconfiguration. Fixes LOG4J2-993. rgoers
Fix Async root logger config should default includeLocation to false. Fixes LOG4J2-991. Thanks to Ryan Rupp. rpopma
Fix AbstractFilter should not implement equals() and hashCode(). Fixes LOG4J2-985. Thanks to Sean Dawson. rpopma
Add PatternLayout %highlight to support noConsoleNoAnsi like %style. Fixes LOG4J2-984. Thanks to Jonas Höpfner. ggregory
Add Truncate from the end of text format modifier. Fixes LOG4J2-926. Thanks to David Ohana. ggregory
Fix Numerical overflow in BurstFilter not handled correctly. Fixes LOG4J2-980. Thanks to Mikhail Mazurskiy. ggregory
Fix Incorrect unlock in ProviderUtil. Fixes LOG4J2-981. Thanks to Mikhail Mazurskiy. ggregory
Fix KeyStoreConfiguration.createKeyStoreConfiguration() ignores keyManagerFactoryAlgorithm. Fixes LOG4J2-966. Thanks to Gary Gregory. ggregory
Fix Using monitorInterval with YAML config file format causes JSONParseException. Fixes LOG4J2-976. Thanks to Matt Quinn. ggregory
Fix StringFormattedMessage serialization is incorrect. Fixes LOG4J2-964. Thanks to Jonne Jyrylä. ggregory
Fix A new StatusLoggerAdmin listener is added to StatusLogger every time the log is reconfigured. Fixes LOG4J2-947. Thanks to Stefan Wehner. ggregory
Fix SyslogLayout contains extra space. Fixes LOG4J2-968. Thanks to Paul D Johe. ggregory
Fix log4j2.component.properties not read for all properties. Fixes LOG4J2-967. Thanks to Stefan Wehner. ggregory
Fix Another bad priority in Syslog messages. Fixes LOG4J2-971. Thanks to Paul D Johe. ggregory
Fix org.apache.logging.log4j.core.net.ssl.TlsSyslogInputStreamReader does not need to create temp Integer objects. Fixes LOG4J2-972. Thanks to Gary Gregory. ggregory
Fix Typo in EventLogger documentation. Fixes LOG4J2-974. Thanks to Daniel Galán y Martins. ggregory
Update Update LMAX Disruptor from 3.3.0 to 3.3.2. Fixes LOG4J2-988. Thanks to Gary Gregory. ggregory
Update Migrate tests from Logback 1.1.2 to 1.1.3. Fixes LOG4J2-987. Thanks to Gary Gregory. ggregory
Update Update tests to use ActiveMQ from 5.10 to 5.11.1. Fixes LOG4J2-988. Thanks to Gary Gregory. ggregory
Update Update Jackson from 2.5.1 to 2.5.3. Fixes LOG4J2-1004. ggregory
Update Update Slf4j from 1.7.7 to 1.7.12. Fixes LOG4J2-1005. ggregory

Release 2.2 – 2015-02-22

Type Changes By
Fix (JMX) To avoid memory leaks when web applications are restarted, JMX notifications are sent from the caller thread in web applications. For non-web applications notifications are sent from a background thread as before. Fixes LOG4J2-938. Thanks to Mauro Molinari. rpopma
Fix Missing toUpperCase(Locale.ENGLISH). Fixes LOG4J2-957. Thanks to fatih guleryuz. ggregory
Fix Manual refers to Route "AppenderRef" attribute, should be "ref". Fixes LOG4J2-956. Thanks to David Kellerman. ggregory
Update Documentation: clarify system properties to control status logger, improve troubleshooting FAQ entry. Fixes LOG4J2-955. rpopma
Update Incorrect attribute name in PropertiesRewritePolicy example. Fixes LOG4J2-950. Thanks to Joel Edwards. ggregory
Fix Log4j Flume appender is not adding millisecond to the event headers when the event is logged at 000 milliseconds. Fixes LOG4J2-944. Thanks to Vinayaka Ramachandra. ggregory
Add Allow JSON layout to create one compact log record per line. Fixes LOG4J2-941. Thanks to Konstantinos Liakos. ggregory
Add HTML layout should not use attribute minimalization for hr noshade. Fixes LOG4J2-933. Thanks to ppiman at gmail.com. ggregory
Add Specify the SyslogAppender connect timeout value as part of the configuration. The SyslogAppender takes a new parameter connectTimeoutMillis. Fixes LOG4J2-895. ggregory
Add Specify the SocketAppender connect timeout value as part of the configuration. The SyslogAppender takes a new parameter connectTimeoutMillis. Fixes LOG4J2-899. ggregory
Fix Log4j 1.2 Bridge doesn't map level ALL correctly in Category.getEffectiveLevel(). Fixes LOG4J2-924. Thanks to Ryan Rupp. ggregory
Fix ConsoleAppender is missing @PluginFactory annotation at createAppender method. Fixes LOG4J2-931. Thanks to Robert Gacki. ggregory
Fix Logging system fails to initialize if XInclude API is not available. Fixes LOG4J2-919. Thanks to David Johle. ggregory
Fix ThrowableProxy.getExtendedStackTraceAsString causes NullPointerException. Fixes LOG4J2-914. Thanks to Kaj Bjurman. ggregory
Fix XML configuration does not report full error message for XInclude parser configuration problems. Fixes LOG4J2-912. ggregory
Fix ClassLoaderContextSelector uses ClassLoader.toString() as a key Fixes LOG4J2-903. Thanks to Mauro Molinari. ggregory
Fix ThrowableProxy throws NoClassDefFoundError. Fixes LOG4J2-834. Thanks to Nikita Koval, Leonard Broman, Thiago Kronig. ggregory
Fix NullPointerException on filter when mapping JUL to Log4j2. Fixes LOG4J2-893. ggregory
Fix JUL adapter does not map Log4j'2 FATAL level to a JUL level. Fixes LOG4J2-892. ggregory
Fix AbstractLifecycle should not implement equals() and hashCode(). Fixes LOG4J2-881. Thanks to Mariano Gonzalez. ggregory
Fix Javadoc for org.apache.log4j.BasicConfigurator.configure() is incorrect. Fixes LOG4J2-897. ggregory
Fix AbstractLifecycle should not implement equals() and hashCode(). Fixes LOG4J2-891. ggregory
Fix [docs] Using Log4j 2 in Web Applications: Update example (Log4jWebLifeCycle is not visible). Fixes LOG4J2-946. Thanks to artemonster. ggregory
Update Update docs for SyslogAppender: "No structured id name was supplied" Fixes LOG4J2-901. Thanks to Tihomir Meščić, Siegfried Greisinger. ggregory
Update Update from Jackson 2.5.0 to 2.5.1. Fixes LOG4J2-958. ggregory
Update Update from Jackson 2.4.4 to 2.5.0. Fixes LOG4J2-925. ggregory
Update Update Jackson from 2.4.3 to 2.4.4. Fixes LOG4J2-910. ggregory
Update Update Jackson from 2.4.2 to 2.4.3. Fixes LOG4J2-881. ggregory
Update Update maven-core from 3.1.0 to 3.2.3. Fixes LOG4J2-882. ggregory
Update Update tests from org.apache.felix.framework 4.2.1 to 4.4.1. Fixes LOG4J2-883. ggregory
Update Update org.eclipse.osgi from 3.6.0 to 3.7.1. Fixes LOG4J2-884. ggregory
Update Update Apache Flume from to 1.5.2. Fixes LOG4J2-900. ggregory

Release 2.1 – 2014-10-19

Type Changes By
Fix Some typo fixes and enhancements for the site. Fixes LOG4J2-676. Thanks to Stefan Bodewig. rgoers
Add Add ShutdownCallbackRegistry interface for customizable shutdown callback handling. This is particularly useful for application servers that wish to integrate with Log4j 2. Fixes LOG4J2-868. mattsicker
Fix Documentation: fixed missing closing parenthesis in code example. Fixes LOG4J2-866. Thanks to Gerard Weatherby. rpopma
Fix Fixed classloader issue that prevented Log4j from finding the implementation when used in a custom Ant task. Fixes LOG4J2-862. Thanks to Michael Sutherland. mattsicker
Add Supported filtering on custom log levels in configuration. Fixes LOG4J2-589. rpopma
Fix Documentation: fix broken links on left navigation Extending Log4j Configuration sub-menu. Fixes LOG4J2-861. rpopma
Add Documentation: add sections on the JUL Adapter, IO Streams and NoSQL Appenders to the Maven and Ivy page. Fixes LOG4J2-856. rpopma
Fix Documentation: clarified why log4j-core is a compile time dependency in Maven and Ivy page. Fixes LOG4J2-797. Thanks to Andreas Rytina. rpopma
Fix Documentation: fix broken links on Appenders manual page. Fixes LOG4J2-855. rpopma
Fix Prevent NPE when configuration with AsyncLogger/AsyncRoot is reloaded. Fixes LOG4J2-807. rpopma
Add Add a Java lookup to provide nicely formatted runtime version information. Fixes LOG4J2-848. ggregory
Add Move reflection utility class to API's private utility classes. Fixes LOG4J2-809. mattsicker
Update Add 2.1.0 to compatible versions in Log4j API ProviderUtil and update Log4jAPIVersion to 2.1.0 in core META-INF/log4j-provider.properties. Fixes LOG4J2-845. mattsicker
Add Documentation: added Runtime Dependencies link to left nav-bar on site. Fixes LOG4J2-833. rpopma
Add Documentation: added section on XInclude to user manual Configuration page. Fixes LOG4J2-816. rpopma
Fix Documentation: fixed minor issues with Log4j2 web site/documentation. Fixes LOG4J2-678. Thanks to Matt Sicker. rpopma
Update Update JMH to 1.1 from 0.7.2. Fixes LOG4J2-844. rpopma
Fix Migrate JpaHyperSqlAppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-843. rpopma
Fix Migrate JpaH2AppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-842. rpopma
Fix Migrate JdbcHyperSqlAppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-841. rpopma
Fix Migrate JdbcH2AppenderTest JUnit performance test to log4j-perf. Fixes LOG4J2-840. rpopma
Fix Respect external interrupt signal to allow application shutdown after joining AsyncAppender thread. Fixes LOG4J2-830. rpopma
Fix MarkerManager Log4jMarker.hasParents() returns opposite of correct result. Fixes LOG4J2-813. Thanks to David Erichsen, Brandon Barry. ggregory
Fix Documentation: fixed capitalization inconsistency in user manual example config. Fixes LOG4J2-785. rpopma
Fix Fixed issue in RollingFile filePattern: backslashes are path separators, not escape characters. Fixes LOG4J2-829. rpopma
Add Add the Log4j IOStreams component. Fixes LOG4J2-547. mattsicker
Add Added Memory-Mapped File Appender. Fixes LOG4J2-431. Thanks to Claude Mamo. rpopma
Fix ThrowableProxy fails if a class in logged stack trace throws java.lang.Error from initializer Fixes LOG4J2-832. Thanks to Seth Leger. ggregory
Update Documentation: updated FAQ "which jars" diagrams for JUL bridge and 2.1 version. Fixes LOG4J2-831. rpopma
Add Support use of TypeConverter classes through the standard Plugin system. Fixes LOG4J2-827. mattsicker
Fix Avoid ConverterKey plugin clashes by using a more predictable plugin loading infrastructure. Plugins have been segmented into three parts: class path, user-specified packages, and OSGi bundles. Fixes LOG4J2-745. Thanks to Scott Harrington. mattsicker
Fix Fixed plugin scanning redundancy causing massive slowdowns in certain environments. Fixes LOG4J2-798. Thanks to Scott Harrington. mattsicker
Fix Reduced CachedClock thread contention. Fixes LOG4J2-753. rpopma
Fix Fixed memory leak in Tomcat 6 caused by clock background threads unintentionally started by Tomcat after web application stop. Fixes LOG4J2-819. Thanks to Gary Gregory. mattsicker
Add Add simple validation constraint annotations for the Plugin system. Fixes LOG4J2-825. mattsicker
Add Implement a GELF layout. Fixes LOG4J2-428. Thanks to Mark Paluch, Mikael Ståldal. ggregory
Fix FlumePersistentManager now handles LockConflictExceptions in Berkeley Db when sending a batch. Fixes LOG4J2-391. Thanks to Kamal Bahadur. rgoers
Fix Remove invalid Oracle Maven repository. Fixes LOG4J2-782. mattsicker
Update Update Spring Framework to 3.2.11.RELEASE from 3.2.8.RELEASE. Fixes LOG4J2-780. mattsicker
Update Unify the two JMS appenders into a single appender. Configurations written for 2.0 will still work in 2.1+. Fixes LOG4J2-815. mattsicker
Add Add java.util.logging implementation based on log4j-api. See log4j-jul documentation for more details. Fixes LOG4J2-608. mattsicker
Fix Fixed issue where log4j-to-slf4j did not work correctly with SLF4J Simple Logger. Fixes LOG4J2-796. rpopma
Fix SimpleLogger throws ArrayIndexOutOfBoundsException for an empty array. Fixes LOG4J2-811. Thanks to Yogesh Rao. ggregory
Fix Fix OSGi Import-Package problem with the JMS API. Fixes LOG4J2-663. Thanks to Florian Brunner. mattsicker
Add Add support for custom SLF4J Markers in log4j-slf4j-impl module. Fixes LOG4J2-793. mattsicker
Fix PatternLayout should use platform character encoding by default, not UTF-8. Fixes LOG4J2-783. Thanks to Minglei Lee. rpopma
Add Add lookup for application main arguments. Fixes LOG4J2-771. ggregory
Add Add lookup for JVM arguments. Fixes LOG4J2-787. ggregory
Update Update Jackson to 2.4.2 from 2.4.1 (for XML and JSON processing). Fixes LOG4J2-790. ggregory
Update Incomplete documentation for JSONLayout. Fixes LOG4J2-766. Thanks to Bruno P. Kinoshita. ggregory
Update All life cycle implementations should be serializable. This is still work in progress. Fixes LOG4J2-800. ggregory
Update org.apache.logging.log4j.core.Logger should be serializable. This is still work in progress. Fixes LOG4J2-801. ggregory
Update Update javax.mail to 1.5.2 from 1.5.0. Fixes LOG4J2-810. ggregory
Update Update org.eclipse.persistence.jpa to 2.5.2 from 2.5.1. Fixes LOG4J2-822. ggregory
Update FlumeAppender: maxDelay not in seconds, but milliseconds. Add time scale to some settings, for example maxDelayMillis instead of maxDelay. The old names are aliased for compatibility. Fixes LOG4J2-867. ggregory

Release 2.0.2 – 2014-08-16

Type Changes By
Update Update Apache Flume to from 1.5.0. Fixes LOG4J2-775. ggregory
Fix Site: log4j-core component pages were still using the old logo. Fixes LOG4J2-773. rpopma
Fix Documentation improvement: link to dependency tree from log4j-core component page, link to log4j-core component page from FAQ page. Fixes LOG4J2-760. rpopma
Fix Resolved race condition that caused log file rotation to fail with error: "Unable to create directory ..." Fixes LOG4J2-679. rpopma
Fix Prevent application from hanging when PatternLayout configuration has opening '{' but no closing '}'. Fixes LOG4J2-726. rpopma
Fix Startup takes a long time if you have empty packages attribute. Fixes LOG4J2-769. Thanks to Scott Harrington. rpopma
Fix Improved asynchronous loggers and appenders to ensure the formatted message does not change even if parameters are modified by the application. (ParameterizedMessage was already safe.) Improved documentation. Fixes LOG4J2-763. Thanks to Stephen Connolly. rpopma
Fix Emit warning message to console if no configuration file found. Fixes LOG4J2-729. rpopma
Fix Improve warning message when missing log4j-core in the classpath. Fixes LOG4J2-765. rpopma
Fix Clarified in documentation that Commons Logging jar is required when using log4j-jcl. Fixes LOG4J2-722. rpopma
Fix Clarified in documentation that SLF4J API jar is required when using log4j-slf4j-impl. Fixes LOG4J2-723. rpopma
Update Allow Log4jContextFactory subclasses to specify a custom ContextSelector. Fixes LOG4J2-730. rpopma
Fix Fixed various minor site/documentation issues, mostly versioning related. Fixes LOG4J2-759. rpopma
Fix Prevent JUnit test from creating unnecessary Log4j2Plugins.dat during build. Fixes LOG4J2-756. Thanks to Scott Harrington. rpopma

Release 2.0.1 – 2014-07-29

Type Changes By
Fix Avoid unnecessary Clock calls when TimestampMessage is logged. Fixes LOG4J2-744. Thanks to Scott Harrington. rpopma
Fix Improved error message if configuration file not found. Fixes LOG4J2-704. rpopma
Fix Webapp configuration page has incorrect class name. Fixes LOG4J2-750. Thanks to Mike Calmus. ggregory
Fix Retain the default date pattern after fixing the ISO8601 pattern. Fixes LOG4J2-749. Thanks to Scott Harrington. rpopma
Fix DatePatternConverter ISO8601_PATTERN now conforms to ISO8601. Fixes LOG4J2-670. rpopma
Fix Reinstate the package configuration attribute for discovering custom plugins. Fixes LOG4J2-741. rpopma
Fix XInclude not working with relative path. Fixes LOG4J2-742. Thanks to Pascal Chollet. ggregory
Fix Fixed typo in webapp manual regarding sample web.xml file. Fixes LOG4J2-740. Thanks to Kosta Krauth. mattsicker
Fix RollingFileManager deadlock if async action thread fails to start. Fixes LOG4J2-738. Thanks to Timothy Stack. ggregory
Fix Fixed log4j-bom so that it won't specify a default scope on any third party dependencies. Fixes LOG4J2-736. mattsicker
Fix Fixed log4j-bom so that it won't interfere with spring-bom and others. Fixes LOG4J2-735. mattsicker
Fix Updated documentation regarding extensions to LoggerContextFactory and Log4j 2 providers. Fixes LOG4J2-731. mattsicker
Fix Fixed ClassLoader issues in loading Log4j providers in an OSGi environment. Fixes LOG4J2-373. mattsicker
Add Added WebLoggerContextUtils class to log4j-web for helper methods useful for asynchronous servlets. Fixes LOG4J2-725. mattsicker
Add Added documentation for Custom Levels and Custom Loggers. Fixes LOG4J2-710. rpopma
Fix Correctly handle NetworkOnMainThreadException thrown on Android during Log4j2 initialization. Fixes LOG4J2-719. rpopma
Fix Automatically disable log4j JMX when detecting we are running on Android. Fixes LOG4J2-716. rpopma
Fix Fixed AbstractDatabaseManager to close connection on writeInternal error. Fixes LOG4J2-657. Thanks to Stefan Wehner. rpopma
Fix Android: java.lang.VerifyError: org/apache/logging/log4j/core/util/Closer Fixes LOG4J2-713. Thanks to Nelson Melina. ggregory
Fix Android: Could not find class 'javax.naming.InitialContext', referenced from method org.apache.logging.log4j.core.lookup.JndiLookup.lookup. Fixes LOG4J2-703. Thanks to Nelson Melina. ggregory
Update to LMAX Disruptor 3.3.0 from 3.2.1. Fixes LOG4J2-732. ggregory
Update to latest Jackson jars from the 2.4.1.X line. Fixes LOG4J2-733. ggregory

Release 2.0 – 2014-07-12

Type Changes By
Fix Fixed issue where Async Logger does not log thread context stack data. API change: added method getImmutableStackOrNull() to ThreadContext.ContextStack interface. Fixes LOG4J2-705. rpopma
Fix Update docs to clarify how to use formatter logger and standard logger together. Fixes LOG4J2-631. rpopma
Add Added support for generating custom logger wrappers that replace the existing log levels and extended logger wrappers that add custom log levels to the existing ones. Fixes LOG4J2-519. rpopma
Fix LoggerConfigs with no Level now inherit the Level from their parent. Fixes LOG4J2-441. rgoers
Add RegexFilter does not match multiline log messages. Fixes LOG4J2-696. ggregory
Fix PatternLayout manual page missing documentation on header/footer. Fixes LOG4J2-699. rpopma
Fix Fixed Serialization error with SocketAppender and Async Loggers. (Fixed in RC2, but wasn't included in release notes.) Fixes LOG4J2-625. rpopma
Fix JMX GUI: fixed occasional ArrayIndexOutOfBoundsException after pressing "reconfigure with XML below". (Fixed in RC2, but wasn't included in release notes.) Fixes LOG4J2-538. rpopma
Fix AsyncLoggerContextSelector should ensure that different AsyncLoggerContext objects created by web app classloaders have unique names. Fixes LOG4J2-666. rpopma
Fix Fix annotation processor warnings on JDK 1.7+. Fixes LOG4J2-683. Thanks to Jurriaan Mous. mattsicker
Fix Fix strange compilation error that popped up in a test class. Fixes LOG4J2-694. mattsicker
Fix Update documentation to specify only Maven 3 is supported. Fixes LOG4J2-692. rgoers
Fix Log4j Web test dependencies should be in scope "test" in the pom. Fixes LOG4J2-690. Thanks to Philip Helger. rgoers
Fix Special characters (tab and so on) in PatternLayout do not work. Fixes LOG4J2-682. Thanks to Scott Harrington. ggregory
Update Make org.apache.logging.log4j.core.layout.AbstractLayout immutable. Fixes LOG4J2-685. ggregory
Fix Core's OptionConverter support for \b is broken (affects PatternLayout). Fixes LOG4J2-686. ggregory
Fix Rename org.apache.logging.log4j.core.util.Closer.closeSilent() to closeSilently(). Fixes LOG4J2-687. ggregory
Fix Make org.apache.logging.log4j.core.layout.PatternLayout immutable. Fixes LOG4J2-688. ggregory
Update Update Jackson to 2.4.1. Fixes LOG4J2-689. ggregory
Fix Some exceptions are not logged when configuration problems are detected. Fixes LOG4J2-707. ggregory
Update Update Apache Commons Logging to 1.2 from 1.1.3. Fixes LOG4J2-709. ggregory

Release 2.0-rc2 – 2014-06-21

Type Changes By
Add RollingFile and RollingRandomAccessFile now write the layout footer before rollover. Fixes LOG4J2-675. rpopma
Fix RollingRandomAccessFile now writes the layout header after rollover. Fixes LOG4J2-581. Thanks to Alexander Khokhlov. rpopma
Fix RollingFileManager now correctly honours the bufferedIO configuration after rollover. Fixes LOG4J2-622. Thanks to Farooq Khan. rpopma
Add Made RollingFileAppender buffer size configurable. Fixes LOG4J2-674. rpopma
Fix Improved documentation regarding log4j status logger. Fixes LOG4J2-141. Thanks to Joern Huxhorn. rpopma
Fix Fixed issue with "Reconfigure using XML below" function in JMX Client GUI. ConfigurationSource is now a top-level class and can be obtained with Configuration.getConfigurationSource(). LoggerContext.getConfiguration().getConfigurationSource() provides a reliable public method for obtaining a logger context's configuration location and content. Fixes LOG4J2-539. Thanks to Colin Froggatt. rpopma
Fix Invalid XML configuration files do not prevent the config file from being checked again. Fixes LOG4J2-619. Thanks to Scott Harrington. rgoers
Fix JMX: Updating a Logger's level via jConsole now correctly takes effect. Fixes LOG4J2-637. Thanks to Mansoor Sajjad, Jon Wilmoth. rpopma
Fix Correctly process log events when combining AsyncLoggers with AsyncAppender. Fixes LOG4J2-668. rpopma
Fix Prevent NPE when combining AsyncLoggers with AsyncLoggerConfigs. Fixes LOG4J2-669. rpopma
Add Create an appender to route log events to the ServletContext log. Fixes LOG4J2-42. rgoers
Update Support default value for missing key in look ups with fallbacking to looking in the properties map. Fixes LOG4J2-419. Thanks to Woonsan Ko. rgoers
Fix FlumeAvroManager now always uses a client type of default_failover. Fixes LOG4J2-563. Thanks to Michael Friedmann. rgoers
Update Allow configuration files to be located as Servlet Context resources. Fixes LOG4J2-554. rgoers
Fix Reset rollover time when size rollover is triggered. Fixes LOG4J2-535. rgoers
Fix Moved plugin cache file to META-INF for OSGi compatibility. Fixes LOG4J2-664. mattsicker
Fix Fix NPE that can be caused by a null ThreadContextClassLoader. Fixes LOG4J2-640. mattsicker
Add Add Vagrantfile for testing in GNU+Linux. Fixes LOG4J2-655. mattsicker
Fix Log4j 2 throws ArrayIndexOutOfBoundsException. Fixes LOG4J2-651. ggregory
Add Add log4j-perf module to provide a home for all log4j performance tests. Add support for JMH microbenchmark performance tests. Fixes LOG4J2-654. rpopma
Add Add support for default plugin values and attributes. Fixes LOG4J2-652. mattsicker
Add Add support for types other than String for plugin factory values/attributes. Fixes LOG4J2-598. mattsicker
Update Refactor Log4jLogEvent to lazily create ThrowableProxy. Fixes LOG4J2-250. rpopma
Update Upgrade to Flume 1.5.0. Fixes LOG4J2-647. ggregory
Add Implement a SecureSocketAppender and secure server (SSL/TLS). Fixes LOG4J2-644. ggregory
Update Merge the TLS Syslog appender into the Syslog appender. Fixes LOG4J2-646. ggregory
Fix Perform reconfiguration in a separate thread to prevent deadlocks. Fixes LOG4J2-620. rgoers
Update Override commons-logging dependency version in tests. Fixes LOG4J2-641. mattsicker
Fix Prevent NPE in AsyncLogger and AsyncLoggerConfig if logger is used after log4j has been shut down. Fixes LOG4J2-639. Thanks to Mck SembWever. rpopma
Fix FailoverAppender was not resetting its status after the primary appender recovered. Fixes LOG4J2-469. rgoers
Fix Generate MDC properties as a JSON map in JSONLayout. Fixes LOG4J2-623. rgoers
Update Made RollingRandomAccessFileAppender buffer size configurable. Fixes LOG4J2-566. Thanks to Luigi Alice. rpopma
Fix Resolved issue where AsyncAppender dropped events if queue still contained events when application is stopped. Fixes LOG4J2-520. Thanks to JavaTech, Andre Bogus. rpopma
Fix Resolved a problem with the previous solution for LOG4J2-392 that resulted in dropped events when using AsyncLoggerConfig with slow appenders when application is stopped. Fixes LOG4J2-392. Thanks to Andre Bogus. rpopma
Fix The OSGi version of log4j-web imports Servlet 2.5 at minimum instead of 3.0. Fixes LOG4J2-613. mattsicker
Fix Unit tests are now less verbose during the build process. Fixes LOG4J2-602. rgoers
Fix Fix shutdown thread memory leak in servlet containers. Fixes LOG4J2-570. mattsicker
Update Use Clock to generate all log event timestamps, not just for Async Loggers. Fixes LOG4J2-628. rpopma
Add Document the system properties used in Log4J 2. Fixes LOG4J2-629. rpopma
Fix Make Throwable transient in ThrowableProxy. Fixes LOG4J2-542. rgoers
Update Update SLF4J to 1.7.7. Fixes LOG4J2-617. mattsicker
Update Update Jackson to 2.3.3. Fixes LOG4J2-616. mattsicker
Fix During shutdown, a NullPointerException could be thrown due to the NullConfiguration class no longer being available to the ClassLoader. Fixes LOG4J2-440. mattsicker
Fix Cyclic dependency with log4j-slf4j-impl in OSGi. Fixes LOG4J2-346. mattsicker
Fix The log4j-1.2-api module didn't export any packages to OSGi. Fixes LOG4J2-345. mattsicker
Fix Password data from the NoSQL plugins no longer shows up in cleartext in debug logging. Fixes LOG4J2-605. mattsicker
Fix A StringIndexOutOfBounds exception could occur during property substitution. Fixes LOG4J2-448. Thanks to X86core. rgoers
Fix StatusLogger was not skipping multiple instances of the FQCN class, causing messages from classes in the Verbose list to be printed. Fixes LOG4J2-597. rgoers
Update Add support for multiple parents to Markers. Fixes LOG4J2-585. Thanks to Bruce Brouwer. rgoers
Add Introduce Java annotation processor as the new plugin pre-caching mechanism. This is available in log4j-core. All custom plugins created before this should be re-built against the current log4j-core. Fixes LOG4J2-595. mattsicker
Fix Renamed SLF4J logger class to Log4jLogger. Fixes LOG4J2-564. mattsicker
Fix Rework Level comparison APIs. Fixes LOG4J2-579. ggregory
Add Add org.apache.logging.log4j.Logger.getLevel(). Fixes LOG4J2-576. ggregory
Update Make Blocking the default WaitStrategy for Async Loggers. Fixes LOG4J2-574. rpopma
Update Introduce ExtendedLogger interface to facilitate implementing and extending Loggers. Fixes LOG4J2-555. Thanks to Bruce Brouwer. rpopma
Fix SyslogAppenderTest and RFC5424LayoutTest were failing in Java 8. Fixes LOG4J2-560. rgoers
Update Allow spaces around commas in Configuration's package attribute. Fixes LOG4J2-561. Thanks to vibin. ggregory
Update Have Logger API expose a PrintWriter instead of custom LoggerStream. Fixes LOG4J2-547. Thanks to Bruce Brouwer. rgoers
Add Add EncodingPatternConverter to escape newlines and HTML special characters. Fixes LOG4J2-439. Thanks to Bruce Brouwer. rgoers
Update Allow header and footer to be specified as lookup patterns in PatternLayout. Fixes LOG4J2-496. rgoers
Fix Add equals and hashcode to Log4jLogEvent. Fixes LOG4J2-499. rgoers
Update SLf4JLogger is now Serializable. Fixes LOG4J2-410. Thanks to Ivlin Zeng. rgoers
Add Add support for configuration via YAML. Fixes LOG4J2-427. Thanks to Alexander Reelsen. rgoers
Fix Add DateLookup and ThreadContextLookup to default lookups. Fixes LOG4J2-378. rgoers
Update Add support to add a LoggerConfig. Document two ways to modify the configuration. Fixes LOG4J2-468. rgoers
Update Rename org.apache.logging.log4j.core.net.SocketServer to TCPSocketServer and refactor with UDP. Fixes LOG4J2-582. ggregory
Update Update Jackson to 2.3.2 from 2.2.2. Fixes LOG4J2-592. ggregory

Release 2.0-rc1 – 2014-02-16

Type Changes By
Removed the DataSourceConnectionSource and the <DriverManager> plugin for the JDBC Appender. It is not safe to use. Please use the DataSource or factory connection sources backed by a connection pool. nickwilliams
Update Renamed the org.apache.logging.log4j.core.appender.db.nosql.mongo package to org.apache.logging.log4j.core.appender.db.nosql.mongodb. nickwilliams
Update Renamed the org.apache.logging.log4j.core.appender.db.nosql.couch package to org.apache.logging.log4j.core.appender.db.nosql.couchdb. grobmeier
Fix (JMX - ObjectNames changed!) Unloading one web application unloads JMX MBeans for all web applications. Fixes LOG4J2-500. rpopma
Update Space Level numbers by 100 instead of 1. Fixes LOG4J2-507. ggregory
Fix Fixed bugs where rolled log files were overwritten by RollingFile appender with composite time and size based policies. Fixes LOG4J2-531. Thanks to Geoff Ballinger. rpopma
Fix Changed the MongoDBConnection to add a MongoDB encoding hook instead of a decoding hook. Fixes LOG4J2-475. Thanks to Matt Sicker. nickwilliams
Fix Fixed the JPAAppender's overuse of transactions by connecting (borrowing from pool) on new write internal or on flush. Fixes LOG4J2-489. nickwilliams
Fix Fixed failure of JDBC and JPA appender to properly release database connections by connecting (borrowing from pool) on new write internal or on flush. Fixes LOG4J2-457. nickwilliams
Fix Fixed problem with JDBC and JPA appender connectivity in WebSphere by connecting (borrowing from pool) on new write internal or on flush. Fixes LOG4J2-442. nickwilliams
Fix Ensured the JDBCAppender commits transactions after a single write or a flush of multiple writes. Fixes LOG4J2-438. nickwilliams
Fix Fixed inability to recover from lost database connection in database appenders by connecting (borrowing from pool) on new write internal or on flush. Fixes LOG4J2-407. nickwilliams
Add (JMX) JMX Client GUI should dynamically update when LoggerContext MBeans are registered/unregistered in MBean server. Fixes LOG4J2-530. rpopma
Fix Stop AsyncLoggerConfig Disruptor thread(s), then AsyncAppender thread(s) first before stopping other appenders. Fixes LOG4J2-511. Thanks to James Pretorius. rpopma
Fix Stop AsyncLoggerConfig Disruptor thread(s), then AsyncAppender thread(s) first before stopping other appenders. Fixes LOG4J2-392. Thanks to ilynaf, Andre Bogus. rpopma
Fix (OSGi) logging.log4j-1.2-api doesn't export the log4j API 1.2. Dependent bundles can not be resolved. Fixes LOG4J2-345. Thanks to Roland Weiglhofer, Matt Sicker. rpopma
Fix LocalizedMessage serialization is broken. Fixes LOG4J2-523. ggregory
Fix Fixed issues with time-based file rollover (monthly, weekly, hourly and every minute). Fixes LOG4J2-385. Thanks to Ace Funk, Porfirio Partida. rpopma
Fix Added a ServletContext attribute that, when set to "true", disables Log4j's auto-initialization in Servlet 3.0+ web applications. Fixes LOG4J2-452. nickwilliams
Fix Exposed Log4j web support interface and methods and the LoggerContext through ServletContext attributes so that threads not affected by filters (such as asynchronous threads) can utilize the LoggerContext. Also updated the Log4j filter so that it supports async. Fixes LOG4J2-512. Thanks to Chandra Sekhar Kakarla, Matt Sicker. nickwilliams
Fix Created a utility to properly escape backslashes before creating URIs, and changed URI creation to use the utility instead of instantiating URI directly. Fixes LOG4J2-409. Thanks to Frank Steinmann, Thomas Neidhart. nickwilliams
Fix Changed the Servlet 3.0 auto-initializer to add the filter by class to get around a WebLogic bug. Fixes LOG4J2-344. Thanks to Keir Lawson, Tomasz Wladzinski. nickwilliams
Fix Changed the Servlet 3.0 auto-initializer so that it does nothing in a Servlet 2.5 or older application. This ensures behavioral consistency across containers. This includes additional fixes to abort initialization if a duplicate filter already exists and to check the actual Servlet EFFECTIVE version. Fixes LOG4J2-359. Thanks to Abhinav Shah. nickwilliams
Fix Switch in log4j-1.2-api Category.getEffectiveLevel has no cases for FATAL, OFF. Fixes LOG4J2-517. rpopma
Update Add support for custom logging levels. Fixes LOG4J2-41. Thanks to Nick Williams. rgoers
Fix (JMX) Unregister all log4j JMX MBeans when the LoggerContext is stopped to allow web application classes to be GC-ed on undeploy. Fixes LOG4J2-406. Thanks to Kerrigan Joseph. rpopma
Fix Configuration was being processed twice at startup. Fixes LOG4J2-405. rgoers
Add ThreadContext now uses plain ThreadLocal by default, unless system property isThreadContextMapInheritable has value "true". Fixes LOG4J2-479. Thanks to MK. rpopma
Fix Configure properties and setup Interpolator before processing rest of configuration. Fixes LOG4J2-398. rgoers
Add Add Stream interface to Loggers. Fixes LOG4J2-481. Thanks to Matt Sicker. rgoers
Update Update EasyMock to version 3.2. Fixes LOG4J2-490. Thanks to Matt Sicker. rgoers
Fix hostName property was not being set until after the first configuration element. Fixes LOG4J2-470. rgoers
Fix Support arrays as sub-elements of a JSON configuration. Fixes LOG4J2-464. rgoers
Fix (JMX) Fixed MalformedObjectNameException if context name contains '=' or newline characters. Fixes LOG4J2-492. Thanks to Shaddy Baddah, Herlani Junior. rpopma
Fix (OSGi) Fix NPE during shutdown. Fixes LOG4J2-377. Thanks to Roland Weiglhofer, Matt Sicker. rpopma
Fix Fixed documentation for MyApp example application in the Automatic Configuration section Fixes LOG4J2-463. Thanks to Michael Diamond, Matt Sicker. rpopma
Fix Fixed error in documentation code example in manual/eventlogging.html Fixes LOG4J2-408. Thanks to Dongqing Hu, Matt Sicker. rpopma
Fix Fixed typo in documentation: system property should be log4j2.loggerContextFactory Fixes LOG4J2-451. Thanks to Vinay Pothnis, Matt Sicker. rpopma
Fix (JMX) Fixed issue where log4j2 LoggerContext did not show up in JMX GUI or JConsole. Fixes LOG4J2-443. Thanks to Colin Froggatt, Tudor Har. rpopma
Fix Fixed issue where toString methods that perform logging could deadlock AsyncAppender. Fixes LOG4J2-485. rpopma
Fix ResolverUtil cannot find packages in file URLs which include the '+' character. Fixes LOG4J2-445. Thanks to Anthony Baldocchi. rpopma
Fix Use the formatted Message in RFC5424Layout for non-StructuredDataMessages. Fixes LOG4J2-430. Thanks to David Gstir. rgoers
Fix Set external context when constructing the LoggerContext. Fixes LOG4J2-459. rgoers
Fix Cannot load log4j2 config file if path contains plus '+' characters. Fixes LOG4J2-466. Thanks to Jan Tepke. rpopma
Fix Fix LogEvent to never return null Level, fixes LevelPatternConverter.format may throw NPE. Fixes LOG4J2-462. Thanks to Daisuke Baba. rpopma
Fix Fix LogEvent to never return null Level, fixes ThresholdFilter throws NPE. Fixes LOG4J2-465. Thanks to Daisuke Baba. rpopma
Fix Fixed issue where toString methods that perform logging could deadlock AsyncLogger. Fixes LOG4J2-471. Thanks to Anthony Baldocchi. rpopma
Add Documentation fix: The attribute of Route to refer to an appender is "ref" not "AppenderRef". Fixes LOG4J2-482. Thanks to Hongdi Ren. rpopma
Add Added option to toggle Thread name caching in AsyncLogger. Fixes LOG4J2-467. Thanks to Anthony Baldocchi. rpopma
Fix The message and ndc fields are not JavaScript escaped in JSONLayout. Fixes LOG4J2-478. Thanks to Michael Friedmann.. ggregory
Fix RingBufferLogEvent should return Message timestamp for TimestampMessage messages. Fixes LOG4J2-455. Thanks to Robin Zhang Tao. rpopma
Fix NPE in ClassLoaderContextSelector. Fixes LOG4J2-477. Thanks to Tal Liron. rpopma
Fix TimeBasedTriggeringPolicy should use event time millis. Fixes LOG4J2-454. Thanks to Robin Zhang Tao. rpopma
Fix BaseConfiguration class does not properly implement Configuration interface. Fixes LOG4J2-472. Thanks to Tal Liron. rpopma
Fix XMLLayout does not include marker name. Fixes LOG4J2-447. Thanks to Jeff Hudren, Mark Paluch, Scott Deboy. ggregory
Update Update Flume Appender to use Flume 1.4.0. Fixes LOG4J2-453. rgoers
Add (JMX) Added MBeans for instrumenting AsyncAppenders and AsyncLogger RingBuffers, exposing queue size, remaining capacity and other attributes. Fixes LOG4J2-423. rpopma
Fix Resolved memory leak by releasing reference to ThreadLocal when AsyncLogger is stopped. Fixes LOG4J2-323. rpopma
Fix Resolved memory leak by populating AsyncLoggerConfigHelper ring buffer via EventTranslatorTwoArg, eliminating the need for a ThreadLocal. Fixes LOG4J2-425. rpopma
Add Create a lookup for resource bundle substitution. Fixes LOG4J2-420. ggregory
Fix Fix Event Level / LoggerConfig Level table at the architecture documentation page. Fixes LOG4J2-417. ggregory
Add Format log event time as UNIX time (seconds or milliseconds). Fixes LOG4J2-415. ggregory
Fix @EnterpriseNumber" was missing in the ID of structured data when RFC5424Layout is used Fixes LOG4J2-404. Thanks to Kamal Bahadur. rgoers
Fix Fixed issue that prevented Log4J from working in Google App Engine. Fixes LOG4J2-379. rpopma
Add Configure FileAppender buffer size. Fixes LOG4J2-401. ggregory
Add Configure RandomAccessFileAppender buffer size. Fixes LOG4J2-402. ggregory
Update Rename package org.apache.logging.log4j.core.appender.rolling.helper to org.apache.logging.log4j.core.appender.rolling.action. Fixes LOG4J2-528. ggregory
Update Resource leak in Flume appender when it cannot create a BerkeleyDB db. Fixes LOG4J2-532. ggregory
Update PatternLayout option to not output ANSI escape codes if no Console is available. Fixes LOG4J2-413. ggregory

Release 2.0-beta9 – 2013-09-14

Type Changes By
Update Renamed FastFileAppender and FastRollingFileAppender to RandomAccessFileAppender and RollingRandomAccessFileAppender. Configurations using the Fast(Rolling)File element no longer work and should be modified to use the (Rolling)RandomAccessFile element. Fixes LOG4J2-317. ggregory
Update Changed the "suppressExceptions" configuration attribute for all Appenders to "ignoreExceptions" to avoid confusion with Java 7 suppressed exceptions. Also renamed the Appender#isExceptionSuppressed() method to Appender#ignoreExceptions() to avoid the same confusion. All Appenders by default internally log and then ignore exceptions encountered while logging. Setting "ignoreExceptions" to "false" on an Appender causes it to allow exceptions to propagate to the caller. You must set "ignoreExceptions" to "false" for Appenders you are wrapping in the Failover Appender. nickwilliams
Update Changed the (relatively new) PatternLayout configuration attribute "suppressExceptions" to "alwaysWriteExceptions" to more correctly indicate what it does. As such, the meaning of this attribute has reversed (previous "true"s should become "false"s, and vice versa). Since this was an undocumented attribute up until now, it's unlikely this change will affect any users. nickwilliams
Fix Fix table of contents generation in pdf. Fixes LOG4J2-226. rgoers
Fix Allow classpath scheme when specifying configuration file location as a system property. Fixes LOG4J2-395. Thanks to Abhinav Shah. rgoers
Fix Initialize PluginManager once during configuration. Move advertisement setup into BaseConfiguration. Fixes LOG4J2-393. rgoers
Fix FlumePersistentManager now handles LockConflictExceptions in Berkeley Db. Fixes LOG4J2-391. Thanks to Kamal Bahadur. rgoers
Add Allow the default file rollover strategy to define the compression level. Fixes LOG4J2-399. ggregory
Add Add TLSAppender. Also added missing license headers to several files. Fixes LOG4J2-338. Thanks to Tibor Benke. rgoers
Fix Use rollover date when substituting ${date} in the filePattern. Fixes LOG4J2-380. rgoers
Add Added FAQ page to the site. Fixes LOG4J2-253. rpopma
Add Add a diagram to the site (FAQ page) that explains when to use which jar. Fixes LOG4J2-362. rpopma
Fix Centralized reflective use of Reflection#getCallerClass and properly handled its instability in various versions of Java. Fixes LOG4J2-322. nickwilliams
Fix Reset the Configuration if the ClassLoaderContextSelector creates a LoggerContext without a configuration location and then is later provided one. Fixes LOG4J2-293. rgoers
Fix Changed the ConfigurationFactory to recognize and properly use the classpath: URI scheme in addition to the classloader: URI scheme. Fixes LOG4J2-293. Thanks to Abhinav Shah. nickwilliams
Fix Changed the Servlet 3.0 auto-initializer so that it does nothing in a Servlet 2.5 or older application. This ensures behavioral consistency across containers. Fixes LOG4J2-359. Thanks to Abhinav Shah. nickwilliams
Add Add more options to PatternLayout to display more detailed information about a Throwable. Fixes LOG4J2-374. Thanks to Tibor Benke. ggregory
Add [Pattern Layout] Customize level names by length. Fixes LOG4J2-383. ggregory
Add [Pattern Layout] Customize level names to lower-case. Fixes LOG4J2-384. ggregory
Update Add support for multiple SD-ELEMENTs in a RFC 5424 syslog message. Fixes LOG4J2-355. Thanks to Tibor Benke. ggregory
Update Cleaned up tests and cleared up documentation for the JPA appender following the resolution of EclipseLink issue #412454. nickwilliams
Fix Fixed issue where SMTPAppender did not send mails with error or fatal level without prior info event. Fixes LOG4J2-310. Thanks to Olivier Lemasle. rpopma
Fix Add PatternLayout constructor to Log4j 1.2 bridge for Velocity. Fixes LOG4J2-368. rgoers
Fix Match artifact ids with Maven module names. Fixes LOG4J2-333. Thanks to Hervé Boutemy. ggregory
Add Add WebLookup to retrieve information from the ServletContext. Fixes LOG4J2-364. Thanks to David Nault. rgoers
Fix JMS appenders send two messages for one append. Fixes LOG4J2-367. Thanks to David Parry. ggregory
Fix Double stack trace logging when using %throwable in %style and %highlight. Fixes LOG4J2-319. ggregory
Add Allow Plugins to have aliases. Fixes LOG4J2-360. rgoers
Fix NoSQLAppender using MongoDB provider ignores username and password attributes Fixes LOG4J2-358. nickwilliams
Add Create a JSON Layout. Fixes LOG4J2-356. ggregory
Fix Removed unnecessary generics from Appender interface and implementing classes. Fixes LOG4J2-343. Thanks to Henning Schmiedehausen. rpopma
Fix [OSGi] wrong Fragment-Host in manifest files. Fixes LOG4J2-351. Thanks to Roland Weiglhofer. rpopma
Fix AsyncLogger errors after multiple calls to LoggerContext.reconfigure(). Fixes LOG4J2-336. Thanks to Andre Bogus. rpopma
Fix Give the AsyncAppender thread a more descriptive name for easier debugging/profiling. Fixes LOG4J2-347. Thanks to David Phillips. rpopma
Fix Modified documentation to refer to SLF4J Binding instead of SLF4J Bridge. Fixes LOG4J2-332. Thanks to Hervé Boutemy. rgoers
Fix Ignore xml:base attributes. Fixes LOG4J2-342. rgoers
Fix Insure jars and distributions only have a single License and Notice file. Fixes LOG4J2-309. rgoers
Add Enable XInclude for XML configurations. Fixes LOG4J2-341. ggregory
Fix JPAAppender stops logging because META-INF/log4j-provider.properties is left open. Fixes LOG4J2-320. ggregory
Fix FlumePersistentManager's writer thread had high CPU usage. Fixes LOG4J2-335. rgoers
Fix Removed erroneous check for affected MongoDB records, which always returns zero on inserts. Fixes LOG4J2-331. nickwilliams
Fix Added a BSON Transformer so that MongoDB can persist Log4j events. Fixes LOG4J2-330. nickwilliams
Fix StatusLogger now only creates StatusData objects if they are the appropriate logging level. Fixes LOG4J2-329. rgoers
Fix FlumePersistentManager was calling Berkeley DB's count method too frequently. Fixes LOG4J2-328. rgoers
Fix Additional fix to make AsyncAppender threads daemon threads and improve their thread name. Fixes LOG4J2-280. rpopma
Fix The slf4j-ext jar is now an optional dependency of the SLF4J bridge. Fixes LOG4J2-165. rgoers
Update Allow shutdown hook to be disabled in the configuration. Fixes LOG4J2-318. rgoers
Fix RoutingAppender's default Route can now be an appender reference. Fixes LOG4J2-166. rgoers
Add Add JNDILookup plugin. Fixes LOG4J2-313. Thanks to Woonsan Ko. rgoers
Fix Add getThrowable method to ThrowableProxy. Fixes LOG4J2-299. rgoers
Fix ThrowableProxy no longer extends Throwable. Fixes LOG4J2-216. rgoers
Fix Synchronized flush() and close() methods in the XxxFileManager and OutputStreamManager classes. Fixes LOG4J2-311. rpopma
Update XML layout improvements (compact vs. pretty, namespace, namespace prefix, root element). Fixes LOG4J2-312. ggregory
Update Update Java Mail dependency to 1.5.0 from 1.4.7. Fixes LOG4J2-388. ggregory
Update Update JDBC tests to use H2 database 1.3.173 from 1.3.172. Fixes LOG4J2-325. ggregory
Update Update commons-logging to 1.1.3 from 1.1.1. Fixes LOG4J2-366. ggregory
Update Update HSQLDB dependency to 2.3.0 from 2.2.9. Fixes LOG4J2-390. ggregory
Update Clarified which library versions were used in Async Loggers performance test. Fixes LOG4J2-308. rpopma
Update Updated Async Loggers' LMAX Disruptor library from 3.0.1 to 3.2.0. Fixes LOG4J2-307. rpopma
Update Update JSON Jackson library to 2.2.2 from 2.2.1. Fixes LOG4J2-306. ggregory
Update Update Jackson dependency to 1.9.13 from 1.9.11. Fixes LOG4J2-387. ggregory
Add Ease porting from 1.x Logger.getRootLogger(): add LogManager.getRootLogger(). Fixes LOG4J2-305. ggregory
Fix Fixed Async Loggers memory leak. Fixes LOG4J2-304. rpopma
Fix Fixed JDBC, JPA, and NoSQL appenders so that the failover appender properly fails over on error. Fixes LOG4J2-291. nickwilliams
Update Improved site by adding quick jump-off page and menu for Javadoc links for all components. nickwilliams
Fix Logger.info(Message) Javadoc is incorrect. Fixes LOG4J2-397. Thanks to Yonatan Graber. ggregory

Release 2.0-beta8 – 2013-07-10

Type Changes By
Update Improved logging initialization in Servlet containers, especially Servlet 3.0 and newer where Log4j now initializes and deinitializes automatically with no deployment descriptor configuration. Fixes LOG4J2-270. nickwilliams
Fix Added toString methods to ThreadContextStack/Map implementation classes. Fixes LOG4J2-302. rpopma
Update Add printf methods to Logger API. Fixes LOG4J2-301. rgoers
Fix WriterThread was ending when no agents are available which caused an OutOfMemoryError. Fixes LOG4J2-300. rgoers
Update Allow the default status level to be specified as a system property. Fixes LOG4J2-282. rgoers
Fix Filter calls from Avro or Flume to be ignored by the FlumeAppender. Fixes LOG4J2-278. rgoers
Fix FlumePersistentManager now calls Berkeley DB from threads to avoid encountering interrupts in the application. Fixes LOG4J2-279. rgoers
Fix Wasted work in FlumePersistentManager.createManager. Fixes LOG4J2-296. ggregory
Fix Wasted work in TestConfigurator.testEnvironment. Fixes LOG4J2-297. ggregory
Fix Wasted work in StyleConverterTest.setupClass. Fixes LOG4J2-298. ggregory
Fix AsyncLogger threads are now daemon threads and won't prevent the JVM from shutting down anymore. Fixes LOG4J2-280. rpopma
Fix Fast(Rolling)FileAppender now correctly handles messages exceeding the buffer size. Fixes LOG4J2-295. rpopma
Fix FastRollingFileAppender with TimeBasedTriggeringPolicy now works correctly if append=false. Fixes LOG4J2-271. rpopma
Fix FastRollingFileAppender with TimeBasedTriggeringPolicy now works correctly if append=false. Fixes LOG4J2-267. rpopma
Fix Fast(Rolling)FileAppender now correctly appends to (does not overwrite) existing file. Fixes LOG4J2-292. rpopma
Update LogManager.getLogger can now be called without a logger name or with a null logger name. Fixes LOG4J2-294. rgoers
Fix Upgrade javadoc plugin to 2.9.1 to fix javadoc security issue. Fixes LOG4J2-289. rgoers
Update Update JUnit to 4.11 from 4.7. Fixes LOG4J2-288. gregory
Update Update test H2 JDBC driver to 1.172 from 1.171. Fixes LOG4J2-286. gregory
Update Update Jansi jar to 1.11 from 1.9. Fixes LOG4J2-285. gregory
Update Update Log4j 1 dependency to 1.2.17 from 1.2.16. Fixes LOG4J2-284. gregory
Update Update NoSQL dependencies: lightcouch 0.0.6 from 0.0.5, mongodb 2.11.2 from 2.11.1. Fixes LOG4J2-386. gregory
Update Remove dependency on Apache ORO jar. Fixes LOG4J2-283. gregory
Update Wasted work in RollingAppenderSizeTest.testAppender() and others. Fixes LOG4J2-277. gregory
Fix Fix NullPointerException (regression due to fix for LOG4J2-228) Fixes LOG4J2-139. rgoers
Update Include arbitrary message fields in RFC-5424 structured data. Fixes LOG4J2-168. Thanks to Scott Severtson. rgoers
Fix FlumeAvroManager fails to notify client of failing event if Flume RPCClient cannot be created. Fixes LOG4J2-275. rgoers
Update Wasted work in UUIDUtil initialization. Fixes LOG4J2-274. ggregory
Update Wasted work in XMLLayout.toSerializable(). Fixes LOG4J2-273. ggregory

Release 2.0-beta7 – 2013-06-01

Type Changes By
Update Allow context parameters in Log4jContextListener to include properties. Fixes LOG4J2-249. rgoers
Fix Do not allow a charset on RFC5424Layout - use UTF-8. Fixes LOG4J2-263. rgoers
Fix StringFormattedMessage and MessageFormatMessage now will accept a Throwable as their last argument and pass it on. Fixes LOG4J2-242. rgoers
Update Allow custom LogEventFactories. Fixes LOG4J2-243. rgoers
Update Add support for interceptors in the embedded Flume Appender. Fixes LOG4J2-262. Thanks to Edward Sargisson. rgoers
Fix Use transaction when batch size is 1. Fixes LOG4J2-269. rgoers
Fix Add guid to FlumeEvent headers for non-Map Messages. Fixes LOG4J2-268. rgoers
Fix Data buffer is reset in finally clause. Fixes LOG4J2-246. rgoers
Fix UDP now sends one event per packet. Fixes LOG4J2-228. rgoers
Update Method name changes in interface org.apache.logging.log4j.spi.ThreadContextMap: getContext() to getCopy(), get() to getImmutableMapOrNull(). rpopma
Update Improve ThreadContext performance with copy-on-write map and stack. Fixes LOG4J2-154. rpopma
Fix Add missing "not" to error message. Fixes LOG4J2-261. Thanks to Edward Sargisson. rgoers
Add Break up core into multiple osgi jars. Fixes LOG4J2-10. Thanks to Timothy Ward. rgoers
Fix Remove LoggerContext when LoggerContext is stopped. Fixes LOG4J2-223. rgoers
Fix XML layout does not specify charset in content type. Fixes LOG4J2-260. ggregory
Fix HTML layout does not specify charset in content type. Fixes LOG4J2-259. ggregory
Fix HTML layout does not output meta element for charset. Fixes LOG4J2-258. ggregory
Fix XML layout ignores charset for the XML processing intruction's encoding attribute. Fixes LOG4J2-257. ggregory
Fix Multi-byte character strings are now assumed to be in the platform default encoding, not UTF-8. Fixes LOG4J2-255. rpopma
Fix Mark OutputStream in OutputStreamManager as volatile. Mark header and footer as final. Fixes LOG4J2-254. rgoers
Fix Rewrite Appender was ignoring filters on referenced appenders. Fixes LOG4J2-244. rgoers
Fix Avoid EmptyStack exception if getCallerClass and SecurityManager are not available. Fixes LOG4J2-245. rgoers
Add New JDBC, JPA, and NoSQL database Appenders. Fixes LOG4J2-229. Thanks to Nick Williams. ggregory
Fix SocketServer.isActive should be volatile because it is accessed from different threads. Fixes LOG4J2-247. ggregory
Add Provide configuration information (location, content type, content if possible) via a registered Advertiser. Fixes LOG4J2-251. sdeboy

Release 2.0-beta6 – 2013-05-05

Type Changes By
Fix Logger.getParent() was not returning the correct Logger. Fixes LOG4J2-231. rgoers
Fix Renamed Plugin annotation attribute from "type" to "category". Fixes LOG4J2-201. rgoers
Update Moved JMX Client GUI classes into separate jmx-gui submodule. Fixes LOG4J2-237. rpopma
Fix Fix: install default root logger if not configured (this is unchanged), but make sure to include configured named loggers. Clarified documentation. Fixes LOG4J2-219. Thanks to Peter DePasquale. rpopma
Fix Use OSGi version format in Fragment-Host Fixes LOG4J2-159. rgoers
Fix RegexFilter threw a NullPointerException when used as a context-wide filter. Fixes LOG4J2-234. rgoers
Fix Add support for interpolating Environment variables when processing the configuration. Fixes LOG4J2-192. rgoers
Fix Removed dependency on tools jar from core module, made jconsole dependency optional. Fixes LOG4J2-235. Thanks to Sebastian Oerding. rpopma
Fix Fixed link to log4j-user mailing list. Fixes LOG4J2-233. rpopma
Update Improved error reporting when misconfigured. Fixes LOG4J2-230. Thanks to Wojciech Zaręba. rpopma
Fix Disruptor will now shutdown during Tomcat shutdown. Fixes LOG4J2-222. Thanks to Steven Yang. rgoers
Update Renamed AsynchAppender to AsyncAppender. Plugin name became Async (was Asynch). rpopma
Update Removed CheckStyle false positives for NewlineAtEndOfFile and whitespace following '*' at end of line in javadoc. rpopma
Update Moved Clock interface to package org.apache.logging.log4j.core.helpers. rpopma
Update Documentation updates to clarify use and impact of location in pattern layouts. Fixes LOG4J2-225. rpopma
Fix The FlumeAppender failed to start if the Flume RPCClient could not connect to any Flume agents. Fixes LOG4J2-224. rgoers
Fix Fix LoggerContext start and stop to eliminate IllegalStateException and NoClassDefFound errors. Fixes LOG4J2-223. rgoers
Fix Remove hundreds of compiler warnings. Fixes LOG4J2-221. Thanks to Nick Williams. rgoers
Fix Various small documentation fixes. Fixes LOG4J2-215. rpopma
Fix Ensure PluginManager streams are always closed. Fixes LOG4J2-217. Thanks to Fabien Sanglard. rpopma

Release 2.0-beta5 – 2013-04-20

Type Changes By
Fix Fix deadlock in SocketAppender. Added option to not wait for socket reconnect. Fixes LOG4J2-205. rgoers
Add Add JMX support. Fixes LOG4J2-207. Thanks to Remko Popma. rgoers
Fix Removing extra spaces in entry and exit method output. Fixes LOG4J2-211. Thanks to Nick Williams. rgoers
Update Async documentation update. Fixes LOG4J2-214. Thanks to Remko Popma. rgoers
Fix Loggers without a "." had no parent logger. Fixes LOG4J2-212. rgoers
Update Move async subproject into core. Fixes LOG4J2-208. Thanks to Remko Popma. rgoers
Fix Call LoggerContext.stop when the application is shutdown. Fixes LOG4J2-212. rgoers
Fix MapMessage was not enclosing key value in quotes when generating XML. Fixes LOG4J2-210. Thanks to Arkin Yetis. rgoers
Fix FlumeAvroManager now uses Flume RPCClient. Fixes LOG4J2-198. rgoers
Fix FlumeAvroManager now uses Flume RPCClient. Fixes LOG4J2-196. rgoers
Fix Use the Maven group ID org.apache.logging.log4j for all artifacts. Fixes LOG4J2-207. ggregory
Add Add tag library. Fixes LOG4J2-187. Thanks to Nick Williams. rgoers
Fix Unit tests now create files in the target directory. Fixes LOG4J2-195. Thanks to Remko Popma. rgoers
Fix RollingFastFileAppender (in log4j-async) did not roll over. Fixes LOG4J2-193. Thanks to Remko Popma. rgoers
Fix Highlight subprojects in sub-navigation. Fixes LOG4J2-199. Thanks to Remko Popma. rgoers
Fix LoggerContext method renamed to removeFilter from removeFiler. Fixes LOG4J2-200. Thanks to Remko Popma. rgoers
Fix ThrowableFormatOptionsTest failed on Windows due to CR/LF issue. Fixes LOG4J2-194. Thanks to Remko Popma. rgoers
Fix BaseConfiguration addLoggerAppender saved appender using the Logger name. Fixes LOG4J2-190. Thanks to Werner. rgoers
Update Move Throwable pattern converter options processing to ThrowableFormatOptions class. Fixes LOG4J2-160. Thanks to Joanne Polsky. rgoers
Update Allowed Loggers access to the properties in the LoggerConfig. Fixes LOG4J2-157. Thanks to Remko Popma. rgoers
Update Added ability to include or exclude location information. Fixes LOG4J2-153. Thanks to Remko Popma. rgoers
Update Allow Logger and LoggerContext to be subclassed. Fixes LOG4J2-151. Thanks to Remko Popma. rgoers
Add Add methods is/setEndOfBatch to LogEvent. Fixes LOG4J2-164. Thanks to Remko Popma. rgoers
Add Add support for asynchronous loggers. Fixes LOG4J2-163. Thanks to Remko Popma. rgoers
Fix The blocking parameter did not work properly on AsynchAppender. Fixes LOG4J2-189. Thanks to Werner. rgoers
Fix AppenderRefs on AsynchAppender didn't support the level and filter elements. Fixes LOG4J2-188. Thanks to Werner. rgoers
Fix Avoid IllegalArgumentException in AsynchAppender. Fixes LOG4J2-176. Thanks to Remko Popma. rgoers
Add Add Logger interface APIs to log at given levels. Fixes LOG4J2-179. ggregory
Fix OutputStreamManager now adds the layout header whenever the OutputStream is set. Fixes LOG4J2-181. rgoers
Fix Fix NullPointerException in DatagramOutputStream when flush is called from multiple threads. Fixes LOG4J2-177. Thanks to Remko Popma. rgoers
Add Added FlumePersistentManager which writes to BerkeleyDB and then writes to Flume asynchronously. rgoers
Fix Plugin cache should be reset when addPackages is called. Fixes LOG4J2-175. sdeboy
Add Expose file appender configuration details via an advertisement mechanism. Fixes LOG4J2-155. sdeboy
Fix Add Fragment-Host to MANIFEST.MF for log4j-core. Fixes LOG4J2-159. Thanks to Jan Winter. rgoers
Fix Configurator throws a ClassCastException if LogManager returns a SimpleLoggerContext. Fixes LOG4J2-167. rgoers
Fix ConfigurationFactory was adding factories on every call. Fixes LOG4J2-169. rgoers
Fix Modify ClassLoaderContextSelector to use the first ClassLoader in the child parent hierarchy that has a Context with a configuration to allow JSPs to use the WebApp's context and configuration. Fixes LOG4J2-161. rgoers
Unknown Add RFC 5424 compliant escaping rules to RFC5424Layout. Fixes LOG4J2-158. Thanks to Scott Severtson. rgoers

Release 2.0-beta4 – 2013-01-28

Type Changes By
Fix LocalizedMessageTest fails on linux system. Fixes LOG4J2-156. Thanks to Andreas Born. ggregory
Fix RollingFileAppender's FileRenameAction was throwing a NullPointerException if no directory was specified on the target file name. Fixes LOG4J2-152. Thanks to Remko Popma. rgoers
Fix Convert all System.getProperty calls to use PropertiesUtil to suppress SecurityExceptions. Fixes LOG4J2-150. rgoers
Fix ThreadContextMapFilter was matching on the key instead of the value of the key. Fixes LOG4J2-147. Thanks to William Burns. rgoers
Fix Allow FlumeAvroManager to initialize even if it cannot connect to an agent. rgoers
Fix SMTPAppender will only cache filtered events. Fixes LOG4J2-149. Thanks to Scott Severtson. rgoers
Fix Add missing serial version IDs. Fixes LOG4J2-145. ggregory
Fix NullPointerException in RFC5424Layout. Fixes LOG4J2-144. ggregory
Fix MessagePatternConverter now returns "null" if the log message is null. Fixes LOG4J2-143. rgoers
Fix Serialized LogEvents were not reset in the output stream causing them to deserialize incorrectly. Fixes LOG4J2-142. rgoers
Fix Fix null pointer exception in SocketAppender if no protocol is specified. The protocol will default to TCP for the SocketAppender and UDP for the SyslogAppender. Fixes LOG4J2-139. rgoers
Add Added Log4j 2 to SLF4J adapter. rgoers
Fix Typo in documentation of SocketAppender. Fixes LOG4J2-140. Thanks to Joern Huxhorn. ggregory
Fix Fix hang in Dumbster SMTP test server. Fixes LOG4J2-137. rgoers
Update Allow newlines to be escaped in Syslog and RFC5424 layouts. Allow Throwables to be included in the output from RFC5424Layout. Fixes LOG4J2-136. Thanks to Scott Severtson. rgoers
Add Add SMTPAppender. Fixes LOG4J2-131. Thanks to Scott Severtson. rgoers
Fix PatternLayout should format throwables without requiring a converter. Fixes LOG4J2-130. rgoers
Add Added hostName and contextName to property map. rgoers
Fix BaseConfiguration does not close the first appender. Fixes LOG4J2-135. Thanks to Ingo Feltes. ggregory
Add Add MessageFormatMessage and FormattedMessage. rgoers
Add Use %red, %white, %blue, and so on in the console appender. Fixes LOG4J2-134. ggregory
Add Allow custom message creation via a message factory. Fixes LOG4J2-133. ggregory
Fix AbstractLogger.catching(Throwable) checks for DEBUG level but logs at ERROR level. Fixes LOG4J2-132. ggregory
Fix RoutingAppender was only creating a single appender for the default Route. Fixes LOG4J2-129. rgoers
Fix Allow JMS appenders to recover if the queue or topic is unavailable. Fixes LOG4J2-126. rgoers
Update Add follow attribute to Console Appender. Fixes LOG4J2-128. rgoers
Fix AbstractLogger methods were not passing Markers to the isEnabled methods. Fixes LOG4J2-127. rgoers
Add Added Flume Appender samples. rgoers
Update Add unit test to verify exceptions are thrown when the socket connection fails. Fixes LOG4J2-122. rgoers
Fix JMSQueue and JMSTopic Appenders did not allow name to be specified. Fixes LOG4J2-125. rgoers
Fix Enhanced javadoc copyright statement. Fixes LOG4J2-111. rgoers
Update Renamed log4j12-api to log4j-1.2-api. Fixes LOG4J2-110. rgoers
Fix TCPSocketManager would fail if the initial connection could not be established. Fixes LOG4J2-120. rgoers
Fix A broken socket connection would cause the TCPSocketManager to continuously reconnect. Fixes LOG4J2-119. rgoers
Fix The example for ThreadContextMapFilter was incorrect. Fixes LOG4J2-123. Thanks to Olivier Lamy. rgoers
Fix File renaming was using the wrong date value. Enhanced DefaultRolloverStrategy to store newest files in highest index as well as lowest. Fixes LOG4J2-116. rgoers
Fix ThreadContext Map elements with null values are now ignored when constructing a Flume event and in the RFC5424 Layout. Fixes LOG4J2-115. rgoers
Fix StructuredDataFilter createFilter was annotated with PluginAttr instead of PluginElement for the KeyValuePairs. Fixes LOG4J2-113. rgoers
Fix StructuredDataMessage was validating the length of the values in the event Map instead of the lengths of the keys. Fixes LOG4J2-114. Thanks to Arkin Yetis. rgoers

Release 2.0-beta3 – 2012-11-11

Type Changes By
Fix Fix NullPointerException in ClassLoaderContextSelector when no class is returned from the SecurityManager. Fixes LOG4J2-108. rgoers
Update Add ability to customize the names of the Levels in the LevelPatternConverter. Fixes LOG4J2-105. rgoers
Fix PatternParser was not properly handling adjacent nested options Fixes LOG4J2-107. rgoers
Fix Add support for loading plugins inside the OSGi bundle. Fixes LOG4J2-95. rgoers
Update Add ThreadContext.push(String format, Object... args) Fixes LOG4J2-85. rgoers
Fix The LogEvent was wrapping a ThrowableProxy with another ThrowableProxy when deserializing. Fixes LOG4J2-103. Thanks to Das Archive. rgoers
Update Created combined jar to combine API and Core contents for users who only want the Log4j implementation. rgoers
Fix Convert LogManager binding to use "regular" java properties instead of XML properties to workaround a bug in Oracle's xmlparserv2 jar. Fixes LOG4J2-104. rgoers
Add Added PropertiesRewritePolicy and ability to define properties on a Logger. Fixes LOG4J2-28. rgoers
Update Build pdf of user's guide. Fixes LOG4J2-87. rgoers
Update Added font and fontSize parameters to HTMLLayout. Replace newlines in message with br tag. Fixes LOG4J2-29. rgoers
Add Added ability to configure from an InputSource. Fixes LOG4J2-55. rgoers
Fix The Facility value was being improperly calculated. Fixes LOG4J2-102. Thanks to Emanuele Colombo. rgoers
Fix A NullPointerException would occur if no format value was passed to the SyslogAppender. Fixes LOG4J2-101. Thanks to Emanuele Colombo. rgoers
Fix MapRewritePolicy had an extra call to putAll that caused updates to behave like adds. Fixes LOG4J2-99. Thanks to Das Archive. rgoers
Fix Avoid NPE when duplicate LoggerContextFactorys are present. Allow factories to specify a weight to allow real implementations to outrank test implementations. Provide a simple default LoggerContextFactory. rgoers
Fix Added several missing classes and methods for Log4j 1.x compatibility. Fixes LOG4J2-97. rgoers
Fix Interpolator was not stripping Lookup key separator when trying to locate the default value for a variable. Fixes LOG4J2-94. Thanks to Denis Treskunov. rgoers
Fix Log4j 1.2 Category.forcedLog was wrapping the message with an ObjectMessage even if the parameter was an ObjectMessage. rgoers

Release 2.0-beta2 – 2012-10-07

Type Changes By
Update Made ParameterizedMessage, StringFormattedMessage and ThreadDumpMessage immutable. LocalizedMessage is immutable except that it will be updated with the logger name when it is added to the LogEvent. rgoers
Fix DefaultConfiguration was not starting the Console Appender. rgoers
Add Add interval and modulate options to TimeBasedTriggeringPolicy to allow more fine-grained control of when file rolling should occur. Fixes LOG4J2-35. rgoers
Add Add support for filtering packages from stack traces. Fixes LOG4J2-58. rgoers
Add If system property "disableThreadContextStack" is set pushes to the ThreadContext will be ignored. If system property "disableThreadContext" is set both puts and pushes will be ignored. Fixes LOG4J2-84. rgoers
Add If system property "disableThreadContextMap" is set puts to the ThreadContext will be ignored. If system property "disableThreadContext" is set both puts and pushes will be ignored. Fixes LOG4J2-83. rgoers
Add Add support for ANSI colors by adding the highlight and style pattern converters. Fix pattern parsing to allow nested patterns. rgoers
Fix Converted DynamicThresholdFilter to use KeyValuePair. Fixed bugs in the Map-based filters to allow declaration of multiple values for a key to match the documentation. Fixes LOG4J2-92. rgoers
Fix Many logging methods in AbstractLogger were set to an incorrect logging level. catching was using the THROWING marker and was set to debug instead of error. Fixes LOG4J2-88. rgoers
Add Allow the status logging to be directed to stderr or to a file. rgoers
Fix Log4j 1.2 adapter's Category class was missing 3 log methods. Fixes LOG4J2-91. rgoers
Fix If the ThreadContext stack is empty the LogEvent will contain a null value to reduce the overhead of creating log events and in the size of the serialized object. Changed the ThreadContext stack to use a custom stack interface instead of java.util.Stack as that class is overly heavy. This change will cause an API incompatibility. Fixes LOG4J2-84. rgoers
Fix If the ThreadContext map is empty the LogEvent will contain a null value to reduce the overhead of creating log events and in the size of the serialized object. Fixes LOG4J2-83. rgoers
Add Add getFormats to MultiformatMessage and allow StructuredDataMessage to format as XML. rgoers
Fix Add documentation on client vs server mode to performance page. Fixes LOG4J2-90. rgoers
Fix Move variable substitution from PatternLayout to appropriate converters to improve performance. rgoers

Release 2.0-beta1 – 2012-09-18

Type Changes By
Add Added AsynchAppender. rgoers
Fix PatternLayout was not honoring format modifiers. Fixes LOG4J-81. rgoers
Fix Created web module to allow web applications to include the Log4j context listener in WEB-INF/lib even if Log4j is in the container's class path. Allow locating the LoggerContext to include the ClassLoader. Updated the Loader utility to always choose the child ClassLoader. Verified in Jboss 5 and Tomcat. rgoers
Fix MarkerFilter called MarkerManager.getMarker causing the Marker to be created during the processing of the configuration. This prevents the application from creating the Marker with any parents. MarkerWrapper in SLF4J-impl was getting a ClassCastException in instanceOf because the Marker isn't a MarkerWrapper. Fixes LOG4J2-82. rgoers
Fix Allow Log4j 2 to be used as the implementation with SLF4J and SLF4J's jcl-over-slf4j by adding filtering to the log method in SLF4JLogger. Fixes LOG4J2-80. Thanks to Oliver Lamy. rgoers
Fix LogFactoryImpl.setAttribute in the Commons Logging bridge got a NullPointerException when passed a null value. It will now remove the attribute. Fixes LOG4J2-78. rgoers
Fix RoutingAppender was calling the stop method for each of its referenced Appenders and was calling the stop method of the default Appender a second time. It will now only call the stop method of Appenders it creates. Fixes LOG4J2-77. rgoers
Fix RewriteAppender was calling the stop method of the referenced appender causing the referenced appender's manager to have its use count decremented too many times. Fixes LOG4J2-76. rgoers
Fix Logger.error(Marker, Message, Throwable) was internally using Level.TRACE. Fixes LOG4J2-74. rgoers
Fix Enhanced Log4jContextListener to accept a configuration file location. Modified FileConfigurationMonitor to monitor files configured that way. Fixed other reconfiguration related bugs. Tested in JBoss and Tomcat. Fixes LOG4J2-75. rgoers
Fix NullPointerException in RollingFileManager when filePattern does not cause the file to be compressed. Fixes LOG4J2-72. rgoers
Fix FileRenameAction did not create the parent directories of the archive files causing the rollover to fail. Fixes LOG4J2-71. rgoers
Update Update the versions of SLF4J and Logback. rgoers

Release 2.0-alpha2 – 2012-08-24

Type Changes By
Add Add getLogger(Class) to LogManager. Fixes LOG4J2-70. rgoers
Add Allow Flume agents to be embedded into the Flume Appender. Fixes LOG4J2-69. rgoers
Add Add support for formatting using String.format(). Fixes LOG4J2-68. rgoers
Add Allow components besides core to create a PluginMap for faster plugin loading and not having to specify the plugin package in the configuration. Fixes LOG4J2-67. rgoers
Fix Fix compilation problems in Java 7. Fixes LOG4J2-64. rgoers
Fix Allow variable substitution on the configuration attributes and on the root log level. Fixes LOG4J2-65. rgoers

Release 2.0-alpha1 – 2012-07-29

Type Changes By
Add Added ability to filter on the AppenderRef by adding either a level or a filter. Fixes LOG4J2-60. Thanks to Shane Kelly. rgoers
Fix Level.toLevel would throw an IllegalArgumentException instead of returning the default value. Fixes LOG4J2-56. Thanks to John Owen Atala. rgoers
Fix Remove LoggerContext support for custom logger factories. All Loggers returned by LoggerContext should be compatibile and of the same type. Fixes LOG4J2-51. Thanks to John Vasileff. rgoers
Fix Make sure all application facing log methods use their own FQCN. This patch resolves a unit test failure for the %C pattern when using the Category logger. Fixes LOG4J2-50. Thanks to John Vasileff. rgoers